Tensor meson excitation in the reaction γγ→KS0KS0

Ch Berger*, H. Genzel, W. Lackas, J. Pielorz, F. Raupach, W. Wagner, A. Klovning, E. Lillestöl, J. Bürger, L. Criegee, A. Deuter, F. Ferrarotto, G. Franke, M. Gaspero, Ch Gerke, G. Knies, B. Lewendel, U. Michelsen, K. H. Pape, B. StellaU. Timm, G. G. Winter, M. Zachara, W. Zimmermann, P. J. Bussey, S. L. Cartwright, J. B. Dainton, D. Hendry, B. T. King, C. Raine, J. M. Scarr, I. O. Skillicorn, K. M. Smith, J. C. Thomson, O. Achterberg, V. Blobel, D. Burkart, K. Diehlmann, M. Feindt, H. Kapitza, B. Koppitz, M. Krüger, M. Poppe, H. Spitzer, R. van Staa, C. Y. Chang, R. G. Glasser, R. G. Kellogg, S. J. Maxfield, R. O. Polvado, B. Sechi-Zorn, J. A. Skard, A. Skuja, A. J. Tylka, G. E. Welch, G. T. Zorn, F. Almeida, A. Bäcker, F. Barreiro, S. Brandt, K. Derikum, C. Grupen, H. J. Meyer, H. Müller, B. Neumann, M. Rosi, K. Stupperich, G. Zech, G. Alexander, G. Bella, Y. Gnat, J. Grunhaus, H. Junge, K. Kraski, C. Maxeiner, H. Maxeiner, D. Schmidt

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


In the analysis of the reaction e+e-→e+e-KS0Ks0 clear evidence for exclusive γγ→f2 resonance production is observed. The product Γγγ ·B(f2→K {Mathematical expression}) is measured to be 0.10-0.03-0.02+0.04+0.03 keV independent of an a priori assumption on the helicity structure. Our data are consistent with a pure helicity 2 contribution and we derive an upper limit for the ratio Γγγ(0)γγ. The absence of events in the mass region around 1.3 GeV clearly proves destructive f2-a2 interference and allows to measure the relative phases between f2, a2 and f2. Upper limits on the production of the glueball candidate states f2(1720) and X(2230) as well as the KS0KS0-continuum are given.

Original languageEnglish
Pages (from-to)329-335
Number of pages7
JournalEuropean Physical Journal C
Issue number3
StatePublished - Sep 1988


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